Every day2025-mk, Dora Dantzler-Wright and her colleagues distribute overdose reversal drugs on the streets of Chicago. They hold training sessions on using them and help people in recovery from drug and alcohol addiction return to their jobs and families.

They work closely with the federal government through an agency that monitors their productivity, connects them with other like-minded groups and dispenses critical funds that keep their work going.

But over the last few weeks, Ms. Wright’s phone calls and emails to Washington have gone unanswered. Federal advisers from the agency’s local office — who supervise her group, the Chicago Recovering Communities Coalition, as well as addiction programs throughout six Midwestern states and 34 tribes — are gone.

“We just continue to do the work without any updates from the feds at all,” Ms. Wright said. “But we’re lost.”

By the end of this week, the staff of the agency, the Substance Abuse and Mental Health Services Administration,66jogo could be cut by 50 percent, according to senior staff members at the agency and congressional aides who attended briefings by Trump officials.

With just under 900 employees and a budget of $7.2 billion for large state grants and individual nonprofits that address addiction and mental illness, SAMHSA (pronounced SAM-sah) is relatively small. But it addresses two of the nation’s most urgent health problems and has generally had bipartisan support.

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Much of the world’s efforts to combat climate change focus on reducing carbon dioxide emissions, which result largely from the burning of fossil fuels like coal, oil and gas, and whose heat-trapping particles can linger in the atmosphere for hundreds of years. But methane’s effects on the climate — which have earned it the moniker “super pollutant” — have become better appreciated recently2025-mk, with the advent of more advanced leak-detection technology, including satellites.